Figures on vaping safety need clarifying

Cotton wool after being exposed to cigarettes (left) and a vaping device (right), during an experiment by Public Health England on the effects of smoking as opposed to vaping.Public Health England’s use of smoking as a benchmark for the relative safety of vaping (Public Health England maintains vaping is 95% safer than smoking, 28 December) will puzzle many given that smoking is not, by any reckoning, “safe”.